-AC_PREREQ(2.59)
-AC_INIT([userspace-rcu],[0.12.0],[mathieu dot desnoyers at efficios dot com], [], [http://liburcu.org/])
-
+dnl SPDX-License-Identifier: LGPL-2.1-only
+dnl
+dnl Copyright (C) 2021 EfficiOS, Inc.
+dnl
+dnl Process this file with autoconf to produce a configure script.
+
+# Project version information
+m4_define([urcu_version_major], [0])
+m4_define([urcu_version_minor], [12])
+m4_define([urcu_version_patch], [0])
+m4_define([urcu_version_dev_stage], [])
+m4_define([urcu_version], urcu_version_major[.]urcu_version_minor[.]urcu_version_patch[]urcu_version_dev_stage)
+
+# Library version information of "liburcu"
# Following the numbering scheme proposed by libtool for the library version
# http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
-AC_SUBST([URCU_LIBRARY_VERSION], [7:0:1])
+m4_define([urcu_lib_version_current], [7])
+m4_define([urcu_lib_version_revision], [0])
+m4_define([urcu_lib_version_age], [1])
+m4_define([urcu_lib_version], urcu_lib_version_current[:]urcu_lib_version_revision[:]urcu_lib_version_age)
+
+
+## ##
+## Autoconf base setup ##
+## ##
+
+AC_PREREQ([2.69])
+AC_INIT([userspace-rcu],[urcu_version],[mathieu dot desnoyers at efficios dot com],[],[http://liburcu.org/])
AC_CONFIG_HEADERS([include/config.h include/urcu/config.h])
AC_CONFIG_AUX_DIR([config])
AC_CANONICAL_TARGET
AC_CANONICAL_HOST
-AM_INIT_AUTOMAKE([1.12 foreign dist-bzip2 no-dist-gzip nostdinc])
+
+## ##
+## Automake base setup ##
+## ##
+
+AM_INIT_AUTOMAKE([1.12 foreign dist-bzip2 no-dist-gzip nostdinc -Wall -Wno-portability -Werror])
AM_MAINTAINER_MODE([enable])
-# Enable silent rules if available (Introduced in AM 1.11)
-m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
+# Enable silent rules by default
+AM_SILENT_RULES([yes])
AC_REQUIRE_AUX_FILE([tap-driver.sh])
AH_TEMPLATE([CONFIG_RCU_SMP], [Enable SMP support. With SMP support enabled, uniprocessors are also supported. With SMP support disabled, UP systems work fine, but the behavior of SMP systems is undefined.])
-AH_TEMPLATE([CONFIG_RCU_HAVE_FUTEX], [Defined when on a system with futex support.])
-AH_TEMPLATE([CONFIG_RCU_ARM_HAVE_DMB], [Use the dmb instruction if available for use on ARM.])
AH_TEMPLATE([CONFIG_RCU_TLS], [TLS provided by the compiler.])
AH_TEMPLATE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [clock_gettime() is detected.])
AH_TEMPLATE([CONFIG_RCU_FORCE_SYS_MEMBARRIER], [Require the operating system to support the membarrier system call for default and bulletproof flavors.])
# Checks for C compiler
AC_USE_SYSTEM_EXTENSIONS
AC_PROG_CC
-AC_PROG_CC_STDC
-
+# AC_PROG_CC_STDC was merged in AC_PROG_CC in autoconf 2.70
+m4_version_prereq([2.70], [], [AC_PROG_CC_STDC])
AS_IF([test "x$def_compiler_tls" = "xyes"], AC_DEFINE([CONFIG_RCU_TLS], [1]), [:])
# Checks for programs.
[AM_CONDITIONAL(USE_CYGWIN, false)]
)
-AS_IF([test "$host_cpu" = "armv7l"],[
- AM_CFLAGS="$AM_CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1"
-])
-
-# ARM-specific checks
-AS_CASE([$host_cpu], [arm*], [
- AC_MSG_CHECKING([for dmb instruction])
- AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
- int main()
- {
- asm volatile("dmb":::"memory");
- return 0;
- }
- ]])
- ],[
- AC_MSG_RESULT([yes])
- AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1])
- ],[
- AC_MSG_RESULT([no])
- ])
-])
-
-# Check if sys_futex() is available
-AC_MSG_CHECKING([for sys_futex()])
-AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
- #include <sys/syscall.h>
- #ifndef __NR_futex
- #error "futexes not available"
- #endif
- ]])
-],[
- AC_MSG_RESULT([yes])
- AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1])
- compat_futex_test=0
-],[
- AC_MSG_RESULT([no])
- compat_futex_test=1
-])
-
# Search for clock_gettime
AC_SEARCH_LIBS([clock_gettime], [rt], [
AC_DEFINE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [1])
config_rcu_have_clock_gettime=yes
], [])
-AM_CONDITIONAL([COMPAT_FUTEX], [test "x$compat_futex_test" = "x1"])
AM_CONDITIONAL([NO_SHARED], [test "x$enable_shared" = "xno"])
# smp-support configure option
])
])
+## ##
+## Substitute variables for use in Makefile.am ##
+## ##
+
+# Library versions for libtool
+AC_SUBST([URCU_LIBRARY_VERSION], [urcu_lib_version])
+
AM_CPPFLAGS="-include config.h"
AC_SUBST(AM_CPPFLAGS)
test "x$def_smp_support" = "xyes" && value=1 || value=0
PPRINT_PROP_BOOL([SMP support], $value)
-# Futex support available
-test "x$compat_futex_test" = "x0" && value=1 || value=0
-PPRINT_PROP_BOOL([Futex support], $value)
-
# TLS
test "x$def_compiler_tls" = "xyes" && value="compiler TLS" || value="pthread_getspecific()"
PPRINT_PROP_STRING([Thread Local Storage (TLS)], [$value])